Subterranean river
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- By Tom Ilifje, Phd
- Report on the IUCN Reactive Monitoring Mission to Puerto
- Pathways Into Darkness: the Search for the Road to Xibalbá Barbara Mac Leod University of Texas, Austin Dennis E
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- Cave Management, Protection and Conservation Strategy and Action Plan (Cmpcsap) 2019-2028
- The Subterranean Environment
- Recent Explorations in the Saint Paul Karst (Palawan, Philippines)
- A Glossary of Karst Terminology
- Puerta-Princesa Subterranean River National Park
- A Case Study of Puerto Princesa Underground River, Palawan, the Philippines
- Complete Issue
- The Navigable Waters Protection Rule: Definition Of
- And the Step 2 Proposal
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- Puerto Princesa Subterranean River National Park the Philippines
- Summary of Final Navigable Waters Protection Rule
- Environmental Drivers of Phototrophic Biofilms in an Alpine Show Cave (SW-Italian Alps)